richness in species

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• Species richness — is the number of species in a given area. It is represented in equation form as S.Typically, species richness is used in conservation studies to determine the sensitivity of ecosystems and their resident species. The actual number of species… …   Wikipedia

• Species distribution — A species range maps represents the geographical region where individuals of a species can be found. This is a range map of Juniperus communis, the common juniper. Species distribution is the manner in which a biological taxon is spatially… …   Wikipedia

• Species-area curve — The species area relationship for a contiguous habitat In ecology, a species area curve is a relationship between the area of a habitat, or of part of a habitat, and the number of species found within that area. Larger areas tend to contain… …   Wikipedia

• richness — the total number of species in a unit area. May be expressed as the number of species divided by the total number of individuals …   Dictionary of ichthyology

• species richness — number of species in a given area or habitat …   Dictionary of ichthyology

• species richness — /spisiz ˈrɪtʃnəs/ (say speeseez richnuhs) noun → alpha diversity …  

• Latitudinal gradients in species diversity — The pattern= The increase in species richness or biodiversity that occurs from the poles to the tropics, often referred to as the latitudinal gradient in species diversity, is one of the most widely recognized patterns in ecology. Put another way …   Wikipedia

• Invasive species — See also: List of invasive species, Introduced species, Pest (organism), and Weed North American beavers constitute an invasive species in Tierra del Fuego, where they have a substantial impact on landscape and local ecology through their… …   Wikipedia

• Introduced species — Alien species redirects here. For life on planets other than Earth, see Extraterrestrial life. For a list of extraterrestrials in fiction, see List of alien species. Sweet clover (Melilotus sp.), introduced and naturalized to the U.S. from… …   Wikipedia

• Cryptic species complex — In biology, a cryptic species complex is a group of species which satisfy the biological definition of species that is, they are reproductively isolated from each other but whose morphology is very similar (in some cases virtually identical). The …   Wikipedia

• Umbrella species — are species selected for making conservation related decisions. Species conservation can be subjective because it is hard to determine the status of many species. With millions of species of concern, the identification of selected keystone… …   Wikipedia